BLACK LIQUID CRYSTAL POLYMER FILM AND MULTILAYER SUBSTRATE

WIPO Patent Application WO/2018/105624

A1

The purpose of the present invention is to provide a black liquid crystal polymer film which, due to containing a sufficient amount of a black pigment, is black in color so as to provide a clear difference in light reflectance from a metal foil, and in which a spot of high-concentration of the black pigment is significantly inhibited, and which has superior dielectric characteristics and insulating characteristics, and a multilayer plate, an electronic circuit substrate, and a multilayer substrate which include the black liquid crystal polymer film and have similar characteristics. The black liquid crystal polymer film according to the present invention is characterized by containing a black pigment and a liquid crystal polymer, and having a brightness of 45 or less, a dielectric loss tangent of 0.0035 or less, and a minimum dielectric strength of 60 kV/mm or more, wherein the ratio of the maximum value to the minimum value of the thermal linear expansion coefficient in a planar direction is 1.0-2.5.

JPH06207075	WATER-SOLUBLE THERMOPLASTIC FILM AND ITS USE
WO/2021/107402	POLYIMIDE FILM AND METHOD FOR MANUFACTURING SAME
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NISHI YOSHIMASA (JP)
FUKUTAKE SUNAO (JP)
MORIYA AKIRA (JP)
IIDA KANTO (JP)

PCT/JP2017/043698

June 14, 2018

December 05, 2017

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MURATA MANUFACTURING CO (JP)

C08J5/18; B32B15/08; C08K3/04; C08L67/03; H05K1/03; H05K3/34

JP2006093438A	2006-04-06
JP2009179763A	2009-08-13
JP2013194225A	2013-09-30
JP2006299254A	2006-11-02
JP2013199599A	2013-10-03
JP2007147880A	2007-06-14

UEKI, Kyuichi et al. (JP)

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